She also spoke about the new Doctor Peter Capaldi, adding: "He's a fantastic actor... and I'm sure he'll be very, very different [as the Doctor].

"He's extraordinary, Peter - just watching him I was interested to see what he would do. I'll be fascinated to see it and he's a very, very good actor so it'll be exciting I think."

Doctor Who showrunner Steven Moffat previously praised the casting of Norris, claiming: "It's a testament to the quality of Peter Harness's intense and emotional script, that we've been able to attract an actress of the brilliance of Hermione Norris."

The eighth series of Doctor Who begins on August 23 on BBC One in the UK and BBC America in the US. Watch a teaser below: